mcfadden and bill weir in new york city, this is "nightline." october 9th, 2012. >>> good evening. i'm bill weir. thanks for being with us tonight. well, it was the same, short walk she took to her colorado grade school every morning. but last friday, 10-year-old jessica ridgeway never made it to her fifth grade classroom. the only clue, her school bag found six miles away. as police search door-to-door, in a town under the microscope. her family speaks out for the first time. and abc's clayton sandell has the latest from colorado. >> reporter: this is 10-year-old jessica ridgeway, horsing around a few months ago with a home video camera and the family dog. >> that's the camera. see? >> reporter: tonight, the video has a special urgency. it was released by colorado police because jessica is missing. and today, for the first time, her parents are speaking out. >> it's the worst thing i've ever been through. >> reporter: the fifth grader vanished last friday, while walking the short distance between her home and her elementary school. >> you don't